SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - CAPITALIZED FINANCING COSTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Capitalized Financing Costs Disclosure [Line Items]
Total capitalized financing costs	$ 448	$ 255	$ 217
SDG&E
Capitalized Financing Costs Disclosure [Line Items]
Total capitalized financing costs	116	116	106
SoCalGas
Capitalized Financing Costs Disclosure [Line Items]
Total capitalized financing costs	$ 77	$ 73	$ 64